This proposed revision of ASHRAE Standard 118.2 - 1993, Method of Testing for Rating Residential Water Heaters, incorporates various changes to improve clarity and consistency. Some material was moved to appendices. Other changes were to require one pre-draw, to require a 24 hour soak-in period before the test, and to handle recovery periods that are preceded by multiple draws. The tolerances allowed in some measurements were reduced and the references were updated.